Many people prefer to shop online because it’s __________ and can help people save ________ money.

Does John serve in the army?—No, but he________in the army for 8 years

I don’t like surfing the Internet, shall I go tothe library instead ______ the information we need

I have some problems __________ my homework. Could youtell me _____

Tom _____ full marks, but he was too careless and made a spelling mistake.